MT-622E
MT Series • Refrigeration Controller
Quick Info
Output Functions
Dual independent circuit controller for dual-zone refrigeration
Technical Specifications
Display & Interface
| Display Type | LED |
| Display Digits | 4 |
| Buttons | 5 |
| LED Indicators | Comp1, Comp2, Defrost1, Defrost2 |
Power Supply
| Voltage | 115-230V AC |
| Voltage Range | 90-264V AC |
| Frequency | 50/60Hz |
| Power Consumption | 6VA |
Sensor Inputs
| Probe Inputs | 4 |
| Probe Type | NTC 10K |
| Temp Range | -50 to 105°C |
| Accuracy | ±0.3°C |
Relay Outputs
| Relay Outputs | 6 |
| Relay Rating | 16A/250VAC (comp), 8A (others) |
Physical
| Panel Size | 75x33 mm |
| Depth | 85 mm |
| IP Rating | IP65 (front) |
| Weight | 160 g |
Operating Conditions
| Operating Temp | -10 to 50°C |
| Storage Temp | -20 to 60°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| L | Power L | Input |
brown
|
| N | Power N | Input |
blue
|
| S1 | Room Probe 1 | Input |
red/white
|
| S2 | Evap Probe 1 | Input |
red/white
|
| S3 | Room Probe 2 | Input |
red/white
|
| S4 | Evap Probe 2 | Input |
red/white
|
| R1 | Compressor 1 | Output |
black
|
| R2 | Defrost 1 | Output |
orange
|
| R3 | Fan 1 | Output |
green
|
| R4 | Compressor 2 | Output |
black
|
| R5 | Defrost 2 | Output |
orange
|
| R6 | Fan 2 | Output |
green
|
Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.
Parameter Settings
| Code | Parameter | Range | Default | Description |
|---|---|---|---|---|
| SP1 | Setpoint 1 | -50 to 105 | 5 °C | Circuit 1 setpoint |
| SP2 | Setpoint 2 | -50 to 105 | -18 °C | Circuit 2 setpoint |
| Hy1 | Hysteresis 1 | 0.1 to 30 | 2 °C | Circuit 1 diff |
| Hy2 | Hysteresis 2 | 0.1 to 30 | 2 °C | Circuit 2 diff |
| dF1 | Defrost 1 Type | 0=Off, 1=Elec | 0 | Circuit 1 defrost |
| dF2 | Defrost 2 Type | 0=Off, 1=Elec | 1 | Circuit 2 defrost |
| dI1 | Defrost 1 Interval | 0 to 24 | 0 hr | Circuit 1 interval |
| dI2 | Defrost 2 Interval | 0 to 24 | 8 hr | Circuit 2 interval |
| LnK | Link Circuits | 0-1 | 0 | 0=Independent, 1=Linked |
Error Codes
Solution: Check S1
Solution: Check S2
Solution: Check S3
Solution: Check S4
Frequently Asked Questions
Yes, ideal for fridge/freezer combo units
LnK=1 synchronizes defrosts for shared condenser
Alternative Models (Cross Reference)
Manufacturer Information
Brand: Full Gauge
Country: Brazil